L-Tryptophan 500 mg

L-Tryptophan 500 mg

Swanson4.7 (939 ratings)
Format:Capsule Quantity: 60 Capsule(s) · 60 servings
Goals
$13.69 $0.22 per serving
iHerb$13.69

Product analysis

47 out of 100

L-Tryptophan 500 mg offers nutritional support for pathways involved in mood, with a more uncertain connection to sleep. Its unspecified preparation makes it harder to compare with other tryptophan supplements.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality20

The tryptophan preparation is insufficiently described for a quality judgment. The stated amount alone does not establish the form’s quality.

Ingredient Transparency63

The amount is clearly stated, making serving comparisons straightforward. The preparation details are missing, so the form cannot be compared in detail.

Value For Money40

Value for money remains uncertain. There is not enough information to make a reliable tryptophan cost comparison.

Customer Satisfaction81

Customer ratings are very positive. The sizeable number of ratings gives the feedback a useful base.

Product Focus55

The formula stays focused on tryptophan’s nutritional role in mood-related pathways. Reliable sleep improvement or broad everyday stress relief remains uncertain.

Format
Capsule
Container
60 Capsule(s)
Per serving
$0.22
Customer rating
4.7 · 939 ratings
Report analysis

Goals

Stress Relief
Stress Relief
Impact
High effect
B Ingredient FitF PathwaysC+ EvidenceA+ Formulation Logic
Tryptophan · 500 mg
Study evidence
Sleep Support
Sleep Support
Impact
Moderate effect
B Ingredient FitF PathwaysD+ EvidenceA+ Formulation Logic
Study evidence
Mood Support
Mood Support
Impact
Lower effect
B Ingredient FitF PathwaysF EvidenceA+ Formulation Logic
Study evidence

Ingredients

IngredientAmount per servingScore
L-Tryptophan
500 mg
Adults 18–50
Report overview
84 Performance

L-Tryptophan 500 mg

Life Extension
The standalone L-form avoids competing amino acids, but source-grade details are not supplied. The supplied analysis indicates a stronger formulation than the original, without relying on an exact price comparison.
82 Performance

L-Tryptophan Powder

NOW
The standalone powder avoids competing amino acids and allows flexible measuring. No unused eligible choice offers a clear across-the-board quality gain, so this represents a formulation trade-off rather than a definite upgrade.
82 Performance

Sleep Nighttime Powder

youtheory
Glycine, L-theanine, magnesium citrate, tryptophan, 5-HTP, and low-dose melatonin create a well-dosed nighttime formula. No unused eligible choice offers a clear across-the-board quality gain, so this represents a formulation trade-off rather than a definite upgrade.
83 Budget

L-Tryptophan 1000 mg

AN Amazing Nutrition Amazing Formulas
The standalone L-form is appropriate, though a tablet is a less flexible delivery format. Its supplied serving cost is lower than the original’s, while the tryptophan-focused formula remains relevant.
83 Budget

L-Tryptophan 500 mg

Jarrow Formulas
The standalone L-form avoids competing amino acids, but source-grade details are not supplied. Its supplied serving cost is lower than the original’s, while the tryptophan-focused formula remains relevant.
85 Budget

L-Tryptophan 500 mg

Doctor's Best
Branded TryptoPure provides useful source-quality differentiation. Fewer than three eligible products are truly cheaper, so this is a closest-cost fallback rather than a genuine cheaper alternative.
82 Value

L-Tryptophan 1000 mg

AN Amazing Nutrition Amazing Formulas
The standalone L-form is appropriate, though a tablet is a less flexible delivery format. Its formulation quality and lower supplied serving cost create a favorable value balance versus the original.
82 Value

L-Tryptophan 500 mg

Swanson Ultra
Branded TryptoPure provides useful source-quality differentiation. Its formulation quality may justify the higher supplied serving cost, though the value advantage depends on prioritizing the ingredient profile.
78 Value

L-Tryptophan 500 mg

Advanced Nutrition by Zahler
The standalone L-form avoids competing amino acids, but source-grade details are not supplied. Its formulation quality may justify the higher supplied serving cost, though the value advantage depends on prioritizing the ingredient profile.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. A systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning
    Kikuchi AM, Tanabe A, Iwahori Y · Journal of Dietary Supplements · 2021
    Systematic review11 studies pooledMood Support forTryptophan
  2. The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression
    Clarinda N Sutanto, Wen Wei Loh, Jung Eun Kim · Nutrition Reviews · 2022
    Meta-analysis4 studies pooledSleep Support forTryptophan